Space Weather Events
Coronal mass ejection — 2026-09-25 11:23 UTC
Narrow CME with a pointy front seen in STEREO A COR2 only. This CME partially overlaps in coronagraphs with the far-sided 2026-09-25T11:09Z CME and its shock. The only potential candidate source is a filament liftoff faintly seen to the south in STEREO A EUV 195 imagery starting 2026-09-25T11Z as a faint dimming and faint post-eruptive arcades centered ~S40W80 or W90. Not really seen in GOES SUVI 304 or STEREO A 304 imagery.
| Event type | Coronal mass ejection |
|---|---|
| Date | |
| Peak (UTC) | — |
| End (UTC) | — |
| Flare class | — |
| Source location / observed at | S40W80 |
| CME speed (most accurate analysis) | 745 km/s |
| Kp index values (as observed) | — |
| CME analyses | 1 |
| Linked events | — |
| Instruments | STEREO A: SECCHI/COR2 |
Research information from NASA DONKI, not an operational warning. NOAA SWPC is the official US source of space weather forecasts.
CME analyses
| Analysis | Time at 21.5 R☉ (UTC) | Speed (km/s) | Half angle (°) | Lat / lon (°) | Type | Technique | Model runs (WSA-ENLIL) |
|---|---|---|---|---|---|---|---|
| #1 (opens in a new tab) Most accurate (DONKI) | 2026-09-25T14:33Z | 745 | 10 | -33 / 84 | C | SWPC_CAT | Shock arrival not predicted; Earth glancing blow: no run (opens in a new tab) |
Analyses are measurements and modelled predictions submitted to DONKI; the "most accurate" mark is DONKI's own.
Provenance
| Source | NASA DONKI — Space Weather Events |
|---|---|
| Feed | DONKI CME |
| Provider data as of | not stated |
| First observed here | 12 Oct 2026, 20:02 EDT |
| Last observed here | 12 Oct 2026, 22:18 EDT |
| In latest snapshot | Yes |
| Record identifier | eee3070c-541f-5090-b124-75706fbecc9e |
Local observation history
What this site observed; not complete provider history.
- — Added